Tooth for excavator-buckets.



No. 805,004. PATENTED NOV. 21, 1905. A. M. GUPPLES.

TOOTH FOR EXCAVATOR BUGKETS. PPPPPPPPPPPPPP ED FEB.3.1905.

f/ f fi UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed February 3, 1905. Serial No. 244,011-

To H/ZZ whom, it may concern.-

Be it known that I, ANDREW M. CUPPLES, a citizen of the United States of America, and a resident of Tyrone, county of Blair, State of Pennsylvania, have invented certain new and useful Improvements in Teeth for Excavator- Buckets, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which Figure 1 represents a vertical longitudinal sectional view of the improved tooth attached to the front edge or nose of a bucket; Fig. 2, a transverse section on the line 2 2 of Fig. 1; Fig. 3, a perspective view of the head of the tooth with the point removed, and Figs. 4, 5, and 6 sectional views of modifications that come within the scope of my invention in its broadest aspect.

This invention has relation to that class of teeth which are removably attached to the front edge or nose of the bucket of a dipperexcavator and which are each provided with a removable steel pointas, for instance, as shown in my former patent, No. 673,423, dated May 7, 1901.

The object of this invention is to provide the contacting surfaces of the point and the nose of the shank with interlocking parts which will prevent the severe lateral strains the teeth are subjected to in excavating rock and ore from shearing off the fastening-rivets.

To the accomplishment of this object and such others as may hereinafter appear, the invention consists of the parts and combination of parts hereinafter fully described, and particularly pointed out in the appended claims, reference being had to the accompanying drawings, forming a part of this specification.

Referring to the drawings by letters, a designates the front edge of the bucket, which is embraced in the usual manner by the flat shanks Z) and c of the tooth and is secured detachably thereto by the usual bolts or rivets.

The forward end of the tooth-body is thickened to form a head whose forward portion is tapered forwardly to a blunt nose, the upper surface (Z of this nose portion being convexed and the under surface 0 being straight.

The point f tapers forwardly to a cutting edge and is formed with two rearward extensions g g, the upper one of which is curved to snugly fit over the surface (Z of the nose and the lower one of which is straight to form a flush continuation of the under surface of the upper surface 61 of the nose.

shank c. l The point is secured to the nose in the usual manner by vertical rivets passing down through both parts 9 and g and the intermediate nose.

Extending longitudinally of both the upper surface cl and the lower surface a of the nose is a groove it, which passes around the blunt end of the nose. This groove receives a correspondingly-shaped rib formed on the interior surfaces of the parts 9 g, forming the socket of the point. This groove and its rib preferably intersect the rivet-holes. These interlocking parts serve to take lateral strains off the rivets, thereby preventing the same being sheared or bent, while at the same time the head or nose portion is not materially weakened, as would be the case were the nose portion of the head vertically slotted for the reception of a web extending vertically across the socket of the point. Furthermore, as will be observed, the ready attachability and detachability of the point is not affected in the least, and, again, the rearward-extending parts g g are obviously strengthened by the rib.

In the modification shown in Fig. 4 the groove is not continuous, the parts it thereof being separated by solid portions of the metal. This structure might be specially desirable for the lighter teeth. In the modification shown in Fig. 5 the groove is shown only in This, too, might afford a sufficient interlocking for the lighter and smaller teeth. As is obvious, when a groove in one surface only is employed this groove may be in the under surface 6, if desired, as shown in dotted lines in this same figure.

In Fig. 6 the groove is shown in the parts 9 g,and the bead or rib is on the surfaces of the nose. This arrangement might be desirable for the larger sizes, where the removal of the metal from the inner surfaces of the socket of the point will not dangerously Weaken the point.

It will be observed that, as in my former patent, the point is of the same width as the head and shank and that its socket is open at the sides. It will also be noted that the interlocking projections and recesses lie within the side edges of the nose and point and run longitudinally thereof.

It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, and I therefore do not wish to be limited to the exact arrangement and construction shown.

What I claim, and desire to secure by Letters Patent, is

1. In a device of the class herein shown and described, a shank portion provided with a head havingaforward-projecting nose, a point having a socket snugly fitting said nose, the contacting surfaces of the socket and the nose being provided with an interlocking rib and groove extending longitudinally thereof, and fastening devices passing down through the parts of the socket and the nose.

2. In a device of the class herein shown and described, a shank provided with a forwardlytapering nose grooved longitudinally, a point fitting the nose snugly and provided with a corresponding rib, and fastening devices.

3. In a device of the class herein shown and described, a shank having a tapering nose portion grooves longitudinally in its upper and lower surfaces, a point having a corresponding rib, and a fastening rivet or rivets.

4. In a device of the class described, a shank portion provided with a head having a forwardly-tapering nose portion, and a removable point having a socket snugly fitting the upper and under'surfaces of said nose, the contacting surfaces being interlocked by having a portion of one of the surfaces projecting into a corresponding depression in the other surface, and fastening-rivets passing down through the point and the nose, said interlocking surfaces serving to relieve said rivets of shearing strain, substantially as set forth.

5. In a device of the class described, a shank provided with a head having a forwardly-projecting nose portion, and a removable point having a socket snugly fitting. the upper and under surfaces of said forwardly-projecting nose, the contacting surfaces being interlocked by having a portion of one of the'sur faces projecting into a recess or depression in the other surface, and fastening means connecting the two parts, for the purpose set forth.

6. In a device of the class described, a shank adapted to be attached to the bucket and having a forwardly-projecting nose at its forward end, this nose portion being provided with recesses in its upper and under surfaces, said recesses lying approximately midway between the side edges of the nose, a removable point of approximately the same width as the nose and having a socket adapted to fit the same, this socket being open at its sides and its inner faces being provided with integral projections adapted to enter the corresponding recesses in the upper and lower faces of the nose, and fastening means passing through the two parts to lock them rigidly together.

7. In a device of the class described, the combination of a shank adapted for attachment to the front edge of the dipper or bucket and provided with a forwardly-tapering nose portion at its forward end, a removable point having an open-sided socket shaped to snugly fit said nose portion, the upper and lower contacting surfaces being interlocked by having an integral part of one of the surfaces projecting into the corresponding recess in the opposite surface, said projecting part and corresponding recess lying approximately midway between the side edges of the point and running longitudinally thereof, and fastening devices extending through the overlapped parts.

In testimony whereof I hereunto affix my signature, in the presence of two witnesses, 

